Additional things to spend for perhaps.
>.> also attacking 10 ranks below is bad.
ie
rank 1. 60k power
rank 10. 15k power
rank 20 10k power
rank 30 6k power
too much of a gap in the ranks.
if a fleets gets destroyed, your rank will drop like from rank 10 to rank 20 and will take several weeks for the player to recover the lost fleet.
Random Suggestion, pay it no heed.
might be ideal to introduce races, handicaps depending on the total power of the race for balancing.
example
5% less resource production, attack and defense if total race points is 5% higher
20 % less resource production, attack and defense if total race points is 20% higher
etc etc
3 races minimum would be ideal.
Increasing the social and interactive aspect of the game would be nice.